EP3301773B1 - Controlling an energy storage system - Google Patents
Controlling an energy storage system Download PDFInfo
- Publication number
- EP3301773B1 EP3301773B1 EP16191857.8A EP16191857A EP3301773B1 EP 3301773 B1 EP3301773 B1 EP 3301773B1 EP 16191857 A EP16191857 A EP 16191857A EP 3301773 B1 EP3301773 B1 EP 3301773B1
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- EP
- European Patent Office
- Prior art keywords
- external
- energy storage
- interface
- storage system
- software instructions
- Prior art date
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- 238000004146 energy storage Methods 0.000 title claims description 76
- 230000015654 memory Effects 0.000 claims description 55
- 238000004590 computer program Methods 0.000 claims description 25
- 238000000034 method Methods 0.000 claims description 17
- 230000002457 bidirectional effect Effects 0.000 claims description 12
- 238000010586 diagram Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 3
- 238000011217 control strategy Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000002085 persistent effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B15/00—Systems controlled by a computer
- G05B15/02—Systems controlled by a computer electric
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/008—Circuit arrangements for ac mains or ac distribution networks involving trading of energy or energy transmission rights
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/04—Circuit arrangements for ac mains or ac distribution networks for connecting networks of the same frequency but supplied from different sources
- H02J3/06—Controlling transfer of power between connected networks; Controlling sharing of load between connected networks
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/16—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by adjustment of reactive power
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/0071—Regulation of charging or discharging current or voltage with a programmable schedule
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
- H02J7/04—Regulation of charging current or voltage
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/66—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S50/00—Market activities related to the operation of systems integrating technologies related to power network operation or related to communication or information technologies
- Y04S50/10—Energy trading, including energy flowing from end-user application to grid
Definitions
- the invention relates to a control device, a method, a computer program and a computer program product for controlling an energy storage system.
- Electrical power distribution grids are used for distribution of power between energy suppliers and energy consumers.
- the grids are typically AC (Alternating Current) grids and are constantly subjected to varying conditions in terms of supply of power, consumption of power, faults, etc.
- Energy storage system comprising energy storage, such as batteries, can be used by energy consumers and energy suppliers to better control the power exchanges with the electrical power distribution grid, in terms of power level (active and/or reactive), frequency and can even be used to time shift power consumption or power supply.
- energy storage such as batteries
- Such energy storage systems need to be controlled properly to achieve the desired function.
- a control device with a user interface is often provided with the energy storage system to allow the owner of the energy storage system to configure its function.
- Each owner of the energy storage system may wish to apply their own logic on how the energy storage system is to be controlled.
- the supplier of the energy storage system can only provide a certain number of programs. It would be an unreasonable situation if the supplier of the energy storage system were to provide a new operation scheme each time a user requests a new control strategy for the energy storage system.
- a method can comprise automatically determining, by a site gateway, information pertaining to one or more components of an energy storage system, where the site gateway and the one or more components are located at a customer site. The method can further comprise configuring, by the site gateway, the energy storage system based on the automatically determined information.
- a control device for controlling an energy storage system comprising an energy storage device, a bidirectional AC/DC converter and a grid connection to an electrical power distribution grid.
- the control device comprises: a processor; an external memory interface for reading external instructions from an external removable memory device; a control interface for controlling the energy storage system; and an internal memory.
- the internal memory stores internal instructions that, when executed by the processor, cause the control device to provide access to the control interface for external instructions, read from the external removable memory device, when the external instructions are executed by the processor.
- the control device may further comprise a user interface device, in which case the internal instructions further comprise instructions that, when executed by the processor, cause the control device to provide access to the user interface device for the external instructions, read from the external removable memory device, when the external instructions are executed by the processor.
- the internal instructions may comprise instructions that, when executed by the processor, cause the control device to provide access to a subset of the user interface device for the external instructions.
- the control device may further comprise a network interface, in which case the internal instructions further comprise instructions that, when executed by the processor, cause the control device to provide access to the network interface for the external instructions, read from the external removable memory device, when the external instructions are executed by the processor.
- the control interface may comprise an interface to read parameters of the energy storage system.
- the control interface may comprise an interface to set a set point for the energy storage system.
- a method for controlling an energy storage system comprising an energy storage device, a bidirectional AC/DC converter and a grid connection to an electrical power distribution grid.
- the method is performed in a control device of the energy storage system and comprises the steps of: reading external instructions from an external removable memory via an external memory interface; executing internal instructions from an internal memory to thereby provide access to a control interface, for controlling the energy storage system, for the external instructions; and executing the external instructions.
- the step of executing may further comprise executing internal instructions from the internal memory to thereby provide access to a user interface device for the external instructions.
- the step of executing may further comprise executing internal instructions from the internal memory to thereby provide access to a network interface for the external instructions.
- the control interface may comprise an interface to read parameters of the energy storage system.
- the control interface may comprise an interface to set a set point for the energy storage system.
- a computer program for controlling an energy storage system comprising an energy storage device, a bidirectional AC/DC converter and a grid connection to an electrical power distribution grid.
- the computer program comprises computer program code which, when run on a control device of the energy storage system causes the control device to: read external instructions from an external removable memory via an external memory interface; execute internal instructions from an internal memory to thereby provide access to a control interface for controlling the energy storage system for the external instructions; and execute the external instructions.
- a computer program product comprising a computer program according to the third aspect and a computer readable means on which the computer program is stored.
- the owner of the energy storage system can develop any suitable control scheme and provide this in the external instructions.
- the control scheme can easily be reprogrammed and provided on a new external removable memory if needed.
- Fig 1 is a schematic diagram illustrating an environment in which embodiments presented herein can be applied. It is here presented an energy storage system 3 which has a grid connection 12 for connection to an electrical power distribution grid 13.
- a transformer 18 is provided for converting voltage from/to the electrical power distribution grid 13 to a more suitable voltage, eventually for storage in an energy storage device 10.
- a bidirectional AC/DC converter 11 is provided for converting AC to DC (Direct Current) and DC to AC.
- the bidirectional AC/DC converter 11 On its AC side, the bidirectional AC/DC converter 11 is connected to the transformer 18, or the grid connection 12 when the transformer 18 is omitted.
- the bidirectional AC/DC converter 11 On its DC side, the bidirectional AC/DC converter 11 is connected to the energy storage device 10.
- a DC filter (not shown) is provided on the DC side of the AC/DC converter 11 and/or an AC filter (not shown) on the AC side of the AC/DC converter 11.
- the energy storage device 10 can contain batteries, capacitors, supercapacitors, etc., connected serially when the voltage rating is to be increased or in parallel for providing increased energy storage capacity for a given voltage rating.
- the energy storage device 10 is not electrical per se, and can e.g. be thermal, mechanical, chemical, as long as a converter to and from the DC side of the AC/DC converter 11 is provided.
- a control device 1 is connected to the energy storage device 10 and the AC/DC converter to control the operation of the energy storage system 3.
- the energy storage system 3 provides great flexibility with regards to how power from the grid 13 is consumed or supplied.
- One application of the energy storage system 3 is to control active power, and/or reactive power on the grid connection to be within a given range or to always seek a target value.
- a second application of the energy storage system 3 is for renewable energy suppliers to provide a more even supply of power to the grid.
- a third application of the energy storage system 3 is for energy consumers to reduce peak energy usage, i.e. storing energy when energy usage is low and consuming energy from storage when energy usage would otherwise exceed a grid power limit.
- a fourth application of the energy storage system 3 is for energy consumers to store power from the grid at times when energy cost is reduced, and consume power from storage when energy cost is high.
- a fifth application of the energy storage system 3 is for energy consumers to store power from the grid to be used if a power outage occurs, thus greatly improving reliability of supplied power. Many more applications may arise in the future. Using the embodiments presented herein, great flexibility of control strategies of the energy storage system 3 is provided.
- Fig 2 is a schematic diagram illustrating components of the control device 1 of Fig 1 , which is provided for control of the energy storage system 3.
- a processor 60 is provided using any combination of one or more of a suitable central processing unit (CPU), multiprocessor, microcontroller, digital signal processor (DSP), application specific integrated circuit etc., capable of executing internal software instructions 66 stored in a memory 64, which can thus be a computer program product.
- the processor 60 can be configured to execute the method described with reference to Fig 3 below.
- the memory 64 can be any combination of read and write memory (RAM) and read only memory (ROM).
- the memory 64 also comprises persistent storage, which, for example, can be any single one or combination of magnetic memory, optical memory, solid state memory or even remotely mounted memory.
- a data memory 67 is also provided for reading and/or storing data during execution of (internal and/or external) software instructions in the processor 60.
- the data memory 67 can be any combination of read and write memory (RAM) and read only memory (ROM).
- a control interface 53 is configured to communicate with other components of the energy storage system, e.g. the bidirectional AC/DC converter 11 and the energy storage device 10.
- the control interface 53 can e.g. be based on a CAN (Controller Area Network) bus or a connection through a main control board.
- the control interface 53 allows the control device to read data, e.g. measurements of voltage, current, frequency, power, temperature, etc., from any connected devices.
- the control interface can send commands of one or more set points to any connected devices (e.g. the bidirectional AC/DC converter 11) to thereby control the operation of the entire energy storage system.
- the set points can e.g. be active power P and/or reactive power Q. In such a case, a sign of the value can be used indicate whether it is consumption of power or supply of power, e.g. through the bidirectional AC/DC converter.
- a network interface 62 allows the control device 1 to communicate with other devices, e.g. over a LAN (Local Area Network) and/or WAN (Wide Area Network), such as the Internet.
- the network interface 62 can e.g. be based on Ethernet, any of the IEEE 802.11x standards, etc. to allow IP (Internet Protocol) based communication.
- a user interface device 52 comprises one or more components to allow an operator to interact with the control device 1.
- the user interface device 52 can comprise a touch screen, providing an efficient and intuitive user interface for the operator.
- the user interface device 52 can comprise a regular display, a keypad/keyboard, a pointer device, a speaker, a microphone, etc.
- An external memory interface 50 allows an external removable memory 51 to be connected to the control device 1.
- the external memory interface 50 can be based on a USB (Universal Serial Bus) interface, SD (Secure Digital) card interface, miniSD card interface, micro SD card interface, memory stick interface, etc.
- the external removable memory 51 can thus e.g. be a USB memory, an SD card, a miniSD card, a micro SD card, a memory stick, etc.
- the external memory interface 50 allows the processor 60 to gain access to external instructions 56 stored in the external removable memory 51.
- the internal instructions 66 when executed by the processor 60, cause the control device 1 to provide access to the control interface 53 when the external instructions 56 are executed by the processor 60.
- the external instructions 56 are read from the external removable memory device 51.
- the external instructions 56 can be accessed directly and executed from the external memory device 51 or the external instructions can first be copied to internal memory 64/67 and executed from there.
- the external instructions 56 are also provided access to the user interface device 52 and/or the network interface 62.
- only a subset of the user interface device 52 is provided for the external instructions 56.
- the external instructions may be provided a panel covering the majority of the area of a touch screen, while a top section is reserved for certain fundamental and/or critical functions, controlled by the internal instructions 66, which always need to be available.
- the external instructions 56 can communicate with a server as desired for additional flexibility. In other words, external information can thus be communicated using the network interface to/from the server.
- the operator of the energy storage system 3 does not need to provide any separate external control device to execute the desired logic, since the external instructions 56 are simply loaded on the external removable memory 51 and connected to the control device 1, thus saving cost.
- the external instructions 56 can be copied to several external removable memories 51, one for each control device of the respective energy storage systems 3.
- Fig 3 is a flow chart illustrating embodiments of methods for controlling the energy storage system of Fig 1 , performed in the control device 1.
- external instructions 56 are read from the external removable memory via the external memory interface 50.
- control interface 53 In an execute internal instructions step 42, internal instructions 66 from the internal memory 64 are executed to thereby provide access to the control interface 53, for controlling the energy storage system 3, for the external instructions 56.
- the control interface 53 can comprise an interface to read parameters of the energy storage system 3 e.g. current configuration and/or measurements of voltage, current, frequency, power, temperature, etc., from any connected devices.
- the control interface 53 can comprise an interface to set a set point for the energy storage system 3, e.g. active power P and/or reactive power Q.
- this step comprises providing access to the user interface device 52 of the control device 1 for the external instructions 56, providing a way for the external instructions to interact with a user of the control device 1.
- this step comprises providing access to the network interface 62 for the external instructions 56, providing even more flexibility for the operator of the energy storage system.
- an execute external instructions step 44 the external instructions 56 are executed, which are then given access to the control interface 53 and optionally the user interface device 52 and/or the network interface 62.
- execute internal instructions step 42 and execute external instructions step 44 can be performed in parallel.
- the read external instructions step 40 can optionally form part of the execute external instructions step 44.
- Fig 4 shows one example of a computer program product comprising computer readable means.
- a computer program 91 can be stored, which computer program can cause a processor to execute a method according to embodiments described herein.
- the computer program product is an optical disc, such as a CD (compact disc) or a DVD (digital versatile disc) or a Blu-Ray disc.
- the computer program product could also be embodied in a memory of a device, such as the computer program product 64 of Fig 2 .
- the computer program 91 is here schematically shown as a track on the depicted optical disk, the computer program can be stored in any way which is suitable for the computer program product, such as a removable solid state memory, e.g. a Universal Serial Bus (USB) drive.
- USB Universal Serial Bus
Description
- The invention relates to a control device, a method, a computer program and a computer program product for controlling an energy storage system.
- Electrical power distribution grids are used for distribution of power between energy suppliers and energy consumers. The grids are typically AC (Alternating Current) grids and are constantly subjected to varying conditions in terms of supply of power, consumption of power, faults, etc.
- Energy storage system, comprising energy storage, such as batteries, can be used by energy consumers and energy suppliers to better control the power exchanges with the electrical power distribution grid, in terms of power level (active and/or reactive), frequency and can even be used to time shift power consumption or power supply.
- Such energy storage systems need to be controlled properly to achieve the desired function. Hence, a control device with a user interface is often provided with the energy storage system to allow the owner of the energy storage system to configure its function.
- Each owner of the energy storage system may wish to apply their own logic on how the energy storage system is to be controlled. However, the supplier of the energy storage system can only provide a certain number of programs. It would be an unreasonable situation if the supplier of the energy storage system were to provide a new operation scheme each time a user requests a new control strategy for the energy storage system.
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US 2014/020244 A1 discloses techniques for provisioning energy generation and/or storage systems. In one embodiment, a method is provided that can comprise automatically determining, by a site gateway, information pertaining to one or more components of an energy storage system, where the site gateway and the one or more components are located at a customer site. The method can further comprise configuring, by the site gateway, the energy storage system based on the automatically determined information. - It is an object to provide greater flexibility of how the control device of an energy storage system is to function.
- According to a first aspect, it is provided a control device for controlling an energy storage system comprising an energy storage device, a bidirectional AC/DC converter and a grid connection to an electrical power distribution grid. The control device comprises: a processor; an external memory interface for reading external instructions from an external removable memory device; a control interface for controlling the energy storage system; and an internal memory. The internal memory stores internal instructions that, when executed by the processor, cause the control device to provide access to the control interface for external instructions, read from the external removable memory device, when the external instructions are executed by the processor.
- The control device may further comprise a user interface device, in which case the internal instructions further comprise instructions that, when executed by the processor, cause the control device to provide access to the user interface device for the external instructions, read from the external removable memory device, when the external instructions are executed by the processor.
- The internal instructions may comprise instructions that, when executed by the processor, cause the control device to provide access to a subset of the user interface device for the external instructions.
- The control device may further comprise a network interface, in which case the internal instructions further comprise instructions that, when executed by the processor, cause the control device to provide access to the network interface for the external instructions, read from the external removable memory device, when the external instructions are executed by the processor.
- The control interface may comprise an interface to read parameters of the energy storage system.
- The control interface may comprise an interface to set a set point for the energy storage system.
- According to a second aspect, it is provided a method for controlling an energy storage system comprising an energy storage device, a bidirectional AC/DC converter and a grid connection to an electrical power distribution grid. The method is performed in a control device of the energy storage system and comprises the steps of: reading external instructions from an external removable memory via an external memory interface; executing internal instructions from an internal memory to thereby provide access to a control interface, for controlling the energy storage system, for the external instructions; and executing the external instructions.
- The step of executing may further comprise executing internal instructions from the internal memory to thereby provide access to a user interface device for the external instructions.
- The step of executing may further comprise executing internal instructions from the internal memory to thereby provide access to a network interface for the external instructions.
- The control interface may comprise an interface to read parameters of the energy storage system.
- The control interface may comprise an interface to set a set point for the energy storage system.
- According to a third aspect, it is provided a computer program for controlling an energy storage system comprising an energy storage device, a bidirectional AC/DC converter and a grid connection to an electrical power distribution grid. The computer program comprises computer program code which, when run on a control device of the energy storage system causes the control device to: read external instructions from an external removable memory via an external memory interface; execute internal instructions from an internal memory to thereby provide access to a control interface for controlling the energy storage system for the external instructions; and execute the external instructions.
- According to a fourth aspect, it is provided a computer program product comprising a computer program according to the third aspect and a computer readable means on which the computer program is stored.
- By allowing the external instructions on the external removable memory to access the control interface and optionally the user interface device and/or the network interface, great flexibility is achieved. The owner of the energy storage system can develop any suitable control scheme and provide this in the external instructions. The control scheme can easily be reprogrammed and provided on a new external removable memory if needed.
- Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise herein. All references to "a/an/the element, apparatus, component, means, step, etc." are to be interpreted openly as referring to at least one instance of the element, apparatus, component, means, step, etc., unless explicitly stated otherwise. The steps of any method disclosed herein do not have to be performed in the exact order disclosed, unless explicitly stated.
- The invention is now described, by way of example, with reference to the accompanying drawings, in which:
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Fig 1 is a schematic diagram illustrating an environment in which embodiments presented herein can be applied; -
Fig 2 is a schematic diagram illustrating components of the control device ofFig 1 , which is provided for control of the energy storage system; -
Fig 3 is a flow chart illustrating embodiments of methods for controlling the energy storage system ofFig 1 , performed in the control device; and -
Fig 4 shows one example of a computer program product comprising computer readable means. - The invention will now be described more fully hereinafter with reference to the accompanying drawings, in which certain embodiments of the invention are shown. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided by way of example so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Like numbers refer to like elements throughout the description.
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Fig 1 is a schematic diagram illustrating an environment in which embodiments presented herein can be applied. It is here presented anenergy storage system 3 which has agrid connection 12 for connection to an electricalpower distribution grid 13. - Optionally, a
transformer 18 is provided for converting voltage from/to the electricalpower distribution grid 13 to a more suitable voltage, eventually for storage in anenergy storage device 10. - A bidirectional AC/
DC converter 11 is provided for converting AC to DC (Direct Current) and DC to AC. On its AC side, the bidirectional AC/DC converter 11 is connected to thetransformer 18, or thegrid connection 12 when thetransformer 18 is omitted. On its DC side, the bidirectional AC/DC converter 11 is connected to theenergy storage device 10. Optionally, a DC filter (not shown) is provided on the DC side of the AC/DC converter 11 and/or an AC filter (not shown) on the AC side of the AC/DC converter 11. - The
energy storage device 10 can contain batteries, capacitors, supercapacitors, etc., connected serially when the voltage rating is to be increased or in parallel for providing increased energy storage capacity for a given voltage rating. Optionally, theenergy storage device 10 is not electrical per se, and can e.g. be thermal, mechanical, chemical, as long as a converter to and from the DC side of the AC/DC converter 11 is provided. - Devices consuming and/or supplying electrical power can be connected to the
grid connector 12. - A
control device 1 is connected to theenergy storage device 10 and the AC/DC converter to control the operation of theenergy storage system 3. - The
energy storage system 3 provides great flexibility with regards to how power from thegrid 13 is consumed or supplied. One application of theenergy storage system 3 is to control active power, and/or reactive power on the grid connection to be within a given range or to always seek a target value. A second application of theenergy storage system 3 is for renewable energy suppliers to provide a more even supply of power to the grid. A third application of theenergy storage system 3 is for energy consumers to reduce peak energy usage, i.e. storing energy when energy usage is low and consuming energy from storage when energy usage would otherwise exceed a grid power limit. A fourth application of theenergy storage system 3 is for energy consumers to store power from the grid at times when energy cost is reduced, and consume power from storage when energy cost is high. A fifth application of theenergy storage system 3 is for energy consumers to store power from the grid to be used if a power outage occurs, thus greatly improving reliability of supplied power. Many more applications may arise in the future. Using the embodiments presented herein, great flexibility of control strategies of theenergy storage system 3 is provided. -
Fig 2 is a schematic diagram illustrating components of thecontrol device 1 ofFig 1 , which is provided for control of theenergy storage system 3. Aprocessor 60 is provided using any combination of one or more of a suitable central processing unit (CPU), multiprocessor, microcontroller, digital signal processor (DSP), application specific integrated circuit etc., capable of executinginternal software instructions 66 stored in amemory 64, which can thus be a computer program product. Theprocessor 60 can be configured to execute the method described with reference toFig 3 below. - The
memory 64 can be any combination of read and write memory (RAM) and read only memory (ROM). Thememory 64 also comprises persistent storage, which, for example, can be any single one or combination of magnetic memory, optical memory, solid state memory or even remotely mounted memory. - A
data memory 67 is also provided for reading and/or storing data during execution of (internal and/or external) software instructions in theprocessor 60. Thedata memory 67 can be any combination of read and write memory (RAM) and read only memory (ROM). - A
control interface 53 is configured to communicate with other components of the energy storage system, e.g. the bidirectional AC/DC converter 11 and theenergy storage device 10. Thecontrol interface 53 can e.g. be based on a CAN (Controller Area Network) bus or a connection through a main control board. Thecontrol interface 53 allows the control device to read data, e.g. measurements of voltage, current, frequency, power, temperature, etc., from any connected devices. Moreover, the control interface can send commands of one or more set points to any connected devices (e.g. the bidirectional AC/DC converter 11) to thereby control the operation of the entire energy storage system. The set points can e.g. be active power P and/or reactive power Q. In such a case, a sign of the value can be used indicate whether it is consumption of power or supply of power, e.g. through the bidirectional AC/DC converter. - A
network interface 62 allows thecontrol device 1 to communicate with other devices, e.g. over a LAN (Local Area Network) and/or WAN (Wide Area Network), such as the Internet. Thenetwork interface 62 can e.g. be based on Ethernet, any of the IEEE 802.11x standards, etc. to allow IP (Internet Protocol) based communication. - A
user interface device 52 comprises one or more components to allow an operator to interact with thecontrol device 1. For instance, theuser interface device 52 can comprise a touch screen, providing an efficient and intuitive user interface for the operator. Alternatively or additionally, theuser interface device 52 can comprise a regular display, a keypad/keyboard, a pointer device, a speaker, a microphone, etc. - An
external memory interface 50 allows an externalremovable memory 51 to be connected to thecontrol device 1. For instance, theexternal memory interface 50 can be based on a USB (Universal Serial Bus) interface, SD (Secure Digital) card interface, miniSD card interface, micro SD card interface, memory stick interface, etc. The externalremovable memory 51 can thus e.g. be a USB memory, an SD card, a miniSD card, a micro SD card, a memory stick, etc. In any case, theexternal memory interface 50 allows theprocessor 60 to gain access toexternal instructions 56 stored in the externalremovable memory 51. - The
internal instructions 66, when executed by theprocessor 60, cause thecontrol device 1 to provide access to thecontrol interface 53 when theexternal instructions 56 are executed by theprocessor 60. Theexternal instructions 56 are read from the externalremovable memory device 51. Theexternal instructions 56 can be accessed directly and executed from theexternal memory device 51 or the external instructions can first be copied tointernal memory 64/67 and executed from there. Optionally, theexternal instructions 56 are also provided access to theuser interface device 52 and/or thenetwork interface 62. Optionally, only a subset of theuser interface device 52 is provided for theexternal instructions 56. For instance, the external instructions may be provided a panel covering the majority of the area of a touch screen, while a top section is reserved for certain fundamental and/or critical functions, controlled by theinternal instructions 66, which always need to be available. - By allowing the
external instructions 56 on the externalremovable memory 51 to access thecontrol interface 53 and optionally theuser interface device 52 and/or thenetwork interface 62, great flexibility is achieved. The owner of the energy storage system can develop any suitable control scheme and provide this in theexternal instructions 56. The control scheme can easily be reprogrammed and provided on a new externalremovable memory 51 if needed. - Moreover, when the
network interface 62 is made available for theexternal instructions 56, theexternal instructions 56 can communicate with a server as desired for additional flexibility. In other words, external information can thus be communicated using the network interface to/from the server. Significantly, the operator of theenergy storage system 3 does not need to provide any separate external control device to execute the desired logic, since theexternal instructions 56 are simply loaded on the externalremovable memory 51 and connected to thecontrol device 1, thus saving cost. Additionally, if the owner operates severalenergy storage systems 3, theexternal instructions 56 can be copied to several externalremovable memories 51, one for each control device of the respectiveenergy storage systems 3. -
Fig 3 is a flow chart illustrating embodiments of methods for controlling the energy storage system ofFig 1 , performed in thecontrol device 1. - In a read external instructions step 40,
external instructions 56 are read from the external removable memory via theexternal memory interface 50. - In an execute internal instructions step 42,
internal instructions 66 from theinternal memory 64 are executed to thereby provide access to thecontrol interface 53, for controlling theenergy storage system 3, for theexternal instructions 56. As explained above, thecontrol interface 53 can comprise an interface to read parameters of theenergy storage system 3 e.g. current configuration and/or measurements of voltage, current, frequency, power, temperature, etc., from any connected devices. Also, thecontrol interface 53 can comprise an interface to set a set point for theenergy storage system 3, e.g. active power P and/or reactive power Q. - Optionally, this step comprises providing access to the
user interface device 52 of thecontrol device 1 for theexternal instructions 56, providing a way for the external instructions to interact with a user of thecontrol device 1. - Optionally, this step comprises providing access to the
network interface 62 for theexternal instructions 56, providing even more flexibility for the operator of the energy storage system. - In an execute external instructions step 44, the
external instructions 56 are executed, which are then given access to thecontrol interface 53 and optionally theuser interface device 52 and/or thenetwork interface 62. - It is to be noted that the execute internal instructions step 42 and execute external instructions step 44 can be performed in parallel. Moreover, the read external instructions step 40 can optionally form part of the execute external instructions step 44.
-
Fig 4 shows one example of a computer program product comprising computer readable means. On this computer readable means acomputer program 91 can be stored, which computer program can cause a processor to execute a method according to embodiments described herein. In this example, the computer program product is an optical disc, such as a CD (compact disc) or a DVD (digital versatile disc) or a Blu-Ray disc. As explained above, the computer program product could also be embodied in a memory of a device, such as thecomputer program product 64 ofFig 2 . While thecomputer program 91 is here schematically shown as a track on the depicted optical disk, the computer program can be stored in any way which is suitable for the computer program product, such as a removable solid state memory, e.g. a Universal Serial Bus (USB) drive. - The invention has mainly been described above with reference to a few embodiments. However, as is readily appreciated by a person skilled in the art, other embodiments than the ones disclosed above are equally possible within the scope of the invention, as defined by the appended patent claims.
Claims (13)
- A control device (1) for controlling an energy storage system (3) comprising an energy storage device (10), a bidirectional AC/DC converter (11) and a grid connection (12) to an electrical power distribution grid (13), the control device (1) comprising:a processor (60);an external memory interface (50) for reading external instructions (56) from an external removable memory device (51);a control interface (53) for controlling the energy storage system (3); andan internal memory (64) storing internal software instructions (66) that, when executed by the processor (60), are configured to cause the control device (1) to provide access to the control interface (53) for external instructions (56), read from the external removable memory device (51), when the external instructions (56) are executed by the processor (60) ;characterised in that the external instructions (56) are software instructions.
- The control device (1) according to claim 1, further comprising a user interface device (52) and wherein the internal software instructions (66) further comprise instructions that, when executed by the processor (60), cause the control device (1) to provide access to the user interface device (52) for the external software instructions (56), read from the external removable memory device (51), when the external software instructions (56) are executed by the processor (60).
- The control device (1) according to claim 2, wherein the internal software instructions (66) comprise instructions that, when executed by the processor (60), cause the control device (1) to provide access to a subset of screen space of the user interface device (52) for the external software instructions (56).
- The control device (1) according to any one of claims 1 to 3, further comprising a network interface (62) and wherein the internal software instructions (66) further comprise instructions that, when executed by the processor (60), cause the control device (1) to provide access to the network interface (62) for the external software instructions (56), read from the external removable memory device (51), when the external software instructions (56) are executed by the processor (60).
- The control device (1) according to any one of claims 1 to 4, wherein the control interface (53) comprises an interface to read parameters of the energy storage system (3).
- The control device (1) according to any one of claims 1 to 5, wherein the control interface (53) comprises an interface to set a set point for the energy storage system (3).
- A method for controlling an energy storage system (3) comprising an energy storage device (10), a bidirectional AC/DC converter (11) and a grid connection (12) to an electrical power distribution grid (13), the method being performed in a control device (1) of the energy storage system (3) and comprising the steps of:reading (40) external software instructions (56) from an external removable memory via an external memory interface (50);executing (42) internal software instructions (66) from an internal memory (64) to thereby provide access to a control interface (53), for controlling the energy storage system (3), for the external software instructions (56); andexecuting (44) the external software instructions (56).
- The method according to claim 7, wherein the step of executing (42) further comprises executing internal software instructions (66) from the internal memory (64) to thereby provide access to a user interface device (52) for the external software instructions (56).
- The method according to claim 7 or 8, wherein the step of executing (42) further comprises executing internal software instructions (66) from the internal memory (64) to thereby provide access to a network interface (62) for the external software instructions (56).
- The method according to any one of claims 7 to 9, wherein the control interface (53) comprises an interface to read parameters of the energy storage system (3).
- The method according to any one of claims 7 to 10, wherein the control interface (53) comprises an interface to set a set point for the energy storage system (3).
- A computer program (66, 91) for controlling an energy storage system (3) comprising an energy storage device (10), a bidirectional AC/DC converter (11) and a grid connection (12) to an electrical power distribution grid (13), the computer program comprising computer program code which, when run on a control device (1) of the energy storage system (3) causes the control device to:read external software instructions (56) from an external removable memory via an external memory interface (50);execute internal software instructions (66) from an internal memory (64) to thereby provide access to a control interface (53), for controlling the energy storage system (3), for the external software instructions (56); andexecute the external software instructions (56).
- A computer program product (64, 90) comprising a computer program according to claim 12 and a computer readable means on which the computer program is stored.
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP16191857.8A EP3301773B1 (en) | 2016-09-30 | 2016-09-30 | Controlling an energy storage system |
DK16191857.8T DK3301773T3 (en) | 2016-09-30 | 2016-09-30 | CONTROL OF AN ENERGY STORAGE SYSTEM |
CN201780060109.6A CN109792151B (en) | 2016-09-30 | 2017-09-25 | Controlling an energy storage system |
KR1020197007607A KR102083134B1 (en) | 2016-09-30 | 2017-09-25 | Control of energy storage systems |
US16/331,813 US20190341799A1 (en) | 2016-09-30 | 2017-09-25 | Controlling An Energy Storage System |
PCT/EP2017/074201 WO2018060128A1 (en) | 2016-09-30 | 2017-09-25 | Controlling an energy storage system |
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EP16191857.8A EP3301773B1 (en) | 2016-09-30 | 2016-09-30 | Controlling an energy storage system |
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EP3301773B1 true EP3301773B1 (en) | 2020-06-03 |
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CN (1) | CN109792151B (en) |
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WO (1) | WO2018060128A1 (en) |
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DE102019217516A1 (en) * | 2019-11-13 | 2021-06-02 | Robert Bosch Gmbh | Control system for an automation system and method for operating an automation system |
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JPH117315A (en) * | 1997-04-21 | 1999-01-12 | Toshiba Corp | Monitor and control system and medium for recording the same processed content |
US20030201990A1 (en) * | 2002-04-16 | 2003-10-30 | Aldrich Bradley C. | Color adaptation for multimedia devices |
EP2286497B1 (en) * | 2008-05-09 | 2016-05-04 | Accenture Global Services Limited | Method and system for managing a power grid |
US8754547B2 (en) * | 2010-11-17 | 2014-06-17 | Battelle Memorial Institute | Controller for hybrid energy storage |
WO2013019989A2 (en) * | 2011-08-02 | 2013-02-07 | The Regents Of The University Of California | Intelligent electric vehicle charging system |
US9313655B2 (en) * | 2011-10-31 | 2016-04-12 | Nokia Corporation | Location privacy in communication networks |
US9270118B2 (en) * | 2012-07-19 | 2016-02-23 | Solarcity Corporation | Techniques for controlling energy generation and storage systems |
CN107111352A (en) * | 2014-11-04 | 2017-08-29 | Lo3能源有限公司 | Calculate the use of the heat energy of generation |
JP6204614B2 (en) * | 2014-11-27 | 2017-09-27 | 京セラ株式会社 | Power control apparatus, power control method, and power control system |
US20160179062A1 (en) * | 2014-12-17 | 2016-06-23 | Caterpillar Inc. | Machine data management system using removable controller |
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WO2018060128A1 (en) | 2018-04-05 |
DK3301773T3 (en) | 2020-09-07 |
CN109792151B (en) | 2021-02-26 |
EP3301773A1 (en) | 2018-04-04 |
US20190341799A1 (en) | 2019-11-07 |
CN109792151A (en) | 2019-05-21 |
KR102083134B1 (en) | 2020-02-28 |
KR20190035911A (en) | 2019-04-03 |
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